STYLE-GUIDE.md

• For trivial things like indentation style, consult .editorconfig; see http://editorconfig.org/ for more.
• Put trailing commas after the last items and match arms to keep future diffs cleaner.
• Consider using use self::Whatever::* for matches that use more than 4 enum variants (regardless of number of enums), or if enum qualifiers are quite long, to keep things concise; e.g. prefer this:

  let drivetype = {
  	use self::id::RPM::*;
  	use self::vendor_attribute::Type::*;
  	match id.rpm {
  		RPM(_) => Some(HDD),
  		NonRotating => Some(SSD),
  		Unknown => None,
  	}
  };

  over:

  let drivetype = match id.rpm {
  	id::RPM::RPM(_) => Some(vendor_attribute::Type::HDD),
  	id::RPM::NonRotating => Some(vendor_attribute::Type::SSD),
  	id::RPM::Unknown => None,
  };

• If for some reason you need to reindent large block of code (e.g. introducing if … {} block around it), do it in a separate commit. That way you'll keep commit diffs semantically clean.
• Never import …::Error directly, always use external error types with at least one qualifier (e.g. match Err(io::Error(…)) but not Err(Error(…))).